Massage gun



FIG. 1 is a rear, right perspective view of a massage gun showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the massager gun which form no part of the claimed design. 

CLAIM The ornamental design for a massage gun, as shown and described. 